Arrangement of the thread winding off spools in double twist twisting spindles



March 1935' o. BOCHMANN El AL ARRANGEMENT OF THE THREAD WINDING OFF SPOOLS IN DOUBLE TWIST TWISTING SPINDLES Filed May 20, 1952 2 Sheets-Sheet 1 bran fqrs March 26, 19351 0. BOCHMANN El AL ARRANGEMENT OF THE THREAD WINDING OFF SPOOLS IN DOUBLE TWIST TWISTING SPINDLES 7 Filed May 20, 1932 2 Sheets-Sheet 2 Iuvcuior: a: AM

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Patented Mar. 26, 1935 UNITED STATES ARRANcEMEN'roF' THE THREAD WINDING OFF SPOOLS IN DOUBLE TWIST TWIST- ING SPINDLES Otto Bochmann and Wilhelm Lenk, Remscheid- Lennep, Germany, assignors to Barmer Maschinenfabrik A.-G., Germany Wuppertal-Oberbarmen,

Application May 20, 1932, Serial No. 612,548

In Germany 3 Claims.

This invention relates to an arrangement of the thread winding off spools in double twist twisting spindles, in which the individual threads to be twisted are pulled on from two or more spools and separately fed to the spindle. It is certainly known in connection with double twist twisting spindles, to arrange several spools one behind the other on the stationary spool holder. In this instance, however, the threads are pulled off laterally, this being open to the objection that for the purpose of conducting the thread over to the twisting spindle a separate thread guide must be provided for each thread so that only a small quantity of thread can be taken up. Moreover, this arrangement makes the construction of the spindle complicated and results in its being much more expensive. Further, the thread is kinked several times, whereby an increased stressing of the thread is caused and the attendance is rendered more difiicult. Moreover, the running ofi thread must rotate the spool, so that varying tensions occur which detrimentally affect the twisting operation.

For the above mentioned reasons it has hitherto been avoided as far as possible, to work from separate spools and consequently so-called com posite spools are employed, on which the threads to be twisted are previously wound all together on one spool and then fed all together to the twisting spindle by drawing over head. This construction is in turn open to the objection that it is impossible to impart an absolutely uniform tension to the threads during the winding, so that when twisting it easily happens that the threads divide before entering the twisting spindle. This results in loops being formed from time to time which are drawn into the spindle and consequently twisted in, so that an irregular and useless yarn is produced. Further, the production of a composite spool in order to obtain an at least approximately uniform thread tension must be carried out with extreme care so that it is only possible to work with low drawing off speeds during the production and consequently long spooling times are necessary. It is further known, to draw off the thread singly over the head directly from spinning cops. These however hold a too small quantity of yarn so that they are unwound in a short time and consequently make the economical working of a double yarn twisting machine questionable.

These disadvantages are overcome by the invention the object of which is, to avoid the production of a composite spool, to obtain a simple July 25, 1931 spindle having a large holding capacity and easy to operate, and to produce a uniform yarn.

The invention consists in that the individual threads to be twisted on double twist twisting spindles are drawn over head from two or more winding ofi spools slipped one behind the other on the stationaryspool holder. Cylindrical or conical cross wound spools may be employed, it being advisable tomake the average diameter of the spool the smaller the nearer the spool is to the point of the spindle, so that the threads can be drawn easily and without hindrance. In the case of special textiles it may also be advantageous to use disc spools which are likewise drawn over head.

According to the type of spool to be placed on the holder, especially when these are cross wound spools, it is advisable to arrange thread guide discs between the winding off spools in order to allow a free drawing of the threads. The thread h guide discs may be so constructed, that they have a rim projecting over the end face of the winding ofi spool situated thereunder, in order to prevent thus a thread from being pulled between the spools when stopping the twisting spindle.

The invention presents the advantage that the threads run off from separate'spools and are conducted to the twisting spindle, the time wasting winding of the composite spool and the separate thread guides being omitted and a strong thread stressing being avoided, so that a smooth and uniform yarn is produced in all cases. Moreover, the individual spools, which are unwound over head, hold a very large quantity of yarn, so that the economy of a double twist twisting machine is considerably increased. It is also possible, to produce in a very short time the .winding ofi spools employed as they can be woundwith a maximum winding ofi speed without special precautions being taken. The arrangement of thread guide discs between the winding oif spools presents further the advantage, that any kind of spools can be used, and that the external diameters of the spools placed on the holder may be diflerent.

Several embodiments of the invention are illustrated by way of example in the accompanying drawings in which:

Fig. 1 shows in side elevation a double twist twisting spindle with two unwinding spools arranged one behind the other.

Fig. 2 is a similar arrangement to Fig. 1 but with three winding ofi spools.

Fig. 3 likewise shows a double twist twisting spindle but with the arrangement of a thread guide disc.

Fig. 4 shows an arrangement in which cylindrical and conical cross wound spools are emplayed.

The threads to be twisted are unwound from" winding of: spools 1 and 2, or 1, 2 and 3, arranged one behind the other and conducted separately to a twisting spindle 4.' These threads pass through the twisting spindle, over a thread guide disc 5 to the winding spool. According to the invention any kind of spools can be employed, such as cylindrical or conical crosswound spools, disc spools and the like.

The feature of the invention consists in that the threads are fed separately to the twisting spindle and drawn over head from winding ofl spools placed one behind the other. According to the type of spool thread guidediscs 6 may be arranged between the winding ofi spools and be preferably provided with a rim 7, which projects over the endface 8 of the winding ofl spool situated thereunder. The arrangement of the rim prevents the thread from being pulled in between the twisting ofl spools when stopping the spindle, so that breaking of a thread is avoided when restarting the spindle.

We claim:

1. An arrargement of thread winding ofi spools in double twist twisting spindles, comprising in combination, a hollow double twist twisting spindle, a stationary spool holder on said spindle, and a plurality of cross wound spools to be wound on over head arranged one behind the other on said holder, the average diameter of the cross wound spools becoming smaller the nearer the spool is to the point of the spindle.

2. An arrangement of thread winding oflE spools in double twist twisting spindles, comprising in combination, a hollow double twist twisting spindle, a stationary spool holder on said spindle, a plurality of cross wound spools to be wound off over head arranged one behind the other on said holder, and thread guide disks arranged between said spools.

3. An arrangement of thread winding off spools in double twist twisting spindles, comprising in combination, a hollow double twist twisting spindle, a stationary spool holder on said spindle, a plurality of cross wound spools to be wound oil over head arranged one behind the other on said holder, thread guide disks between said spools, and a rim on each thread guide disk projecting over the end face of the winding off spool situated thereunder.

OTTO BOCHMANN. WILHELM LENK. 

